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https://github.com/Telecominfraproject/OpenCellular.git
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858d87cfaa
This adds SPI transaction support, and a debug command to read a few values from the SPI EEPROM. Note that the SPI controller is normally *disabled* with all its I/Os high-Z, so this will not interfere with main processor or Servo on the SPI bus. The bus is only enabled during the SPIROM command itself. BUG=chrome-os-partner:7844 TEST=manual 1) Reboot system 2) on EC console, 'spirom'. Should print Man/Dev ID : 0xef 0x16 JEDEC ID : 0xef 0x40 0x17 Unique ID : 0xd1 0x61 0x44 0xb0 0x63 0x5d 0x40 0x32 Status reg 1: 0x00 Status reg 2: 0x00 Note that unique ID is, well, unique, so it won't match my value. But it should still be something not all 0xff's. 3) Power on the system. x86 should still boot normally, indicating that the EC isn't interfering with the SPI bus. Change-Id: I53bf5fdbbe7a37949375d0463e30e408cc6fb6a8
- EC Lib
This wraps Blizzard driverlib and implements the EC chip interface defined
by Google. See below diagram for architecture.
+--------------------+
| Host BIOS/OS |
+--------------------+
---- host interface ----
+--------------------+
| Google EC features |
+--------------------+
---- chip interface ---- The interface is defined in
src/platform/ec/chip_interface/*.
+--------------------+ But the real implementation is in EC Lib.
| EC Lib |
+--------------------+
| Blizzard low level |
| driver, the |
| driverlib. |
+--------------------+